Finally took Gobi to the vet to be weighed and ask for a diet recommendation. He's just a hair over 19lbs and has been free fed about a cup of food 2x daily with his very small mates. They have been maintaining pretty healthy weights, Gobi has just been getting fatter and fatter since he bonded with them. I didn't get a diet recommendation, just a suggestion to try to cut his weight down to 17lbs if i can and then see what he feels like. Gobi's room I believe is too small for a big bunny like him to get exercise in. It's plenty of space for his two smaller mates, but he's at least 3x bigger than them. So to get them some exercise I'm bringing them downstairs to roam around the first floor while I clean their room. I'm also trying to cut Gobi down to 3/4 cup of pellets a day and feeding all the rabbits separately to ensure they're each getting what they need and nobody gets more or less than they should. What do you guys think of this? Do any of you have any suggestions for how I could get my behemoth to trim some fat?